(m4.info.gz) Shell commands
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12 Macros for running shell commands
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There are a few builtin macros in `m4' that allow you to run shell
commands from within `m4'.
Note that the definition of a valid shell command is system
dependent. On UNIX systems, this is the typical `/bin/sh'. But on
other systems, such as native Windows, the shell has a different syntax
of commands that it understands. Some examples in this chapter assume
`/bin/sh', and also demonstrate how to quit early with a known exit
value if this is not the case.
Menu
* Platform macros Determining the platform
* Syscmd Executing simple commands
* Esyscmd Reading the output of commands
* Sysval Exit status
* Maketemp Making temporary files
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